Pneumatic Wafer Butterfly Valve factory

Product Description

Product Overview

Our company's butterfly valves combine numerous advantages and feature unique designs in certain aspects, resulting in optimal valve performance. Our butterfly valves are compatible with pipe flanges including those conforming to ANSI B16.1, ASME B16.47, ISO7005, and GB9113 standards.

Feature 1: The valve disc's sealing edge is designed with a special shape that complements the unique valve seat profile, resulting in low resistance, easy operation, and long service life;

Feature 2: The geometric shape and appearance of both the valve body and valve disc remain undamaged after assembly, thus eliminating leakage points caused during the manufacturing process;

Feature 3: All components of our valves are replaceable, greatly facilitating maintenance;

Feature 4: We use self-lubricating bushings with PTFE-coated metal surfaces, which improves the bearing capacity of the bushings and achieves lower torque.

Customization of Various Valves Available

Our company can also custom-manufacture butterfly valves with special materials in sizes DN40-DN600. The valve body, disc, and seat are all coated with PTFE or PA and other anti-corrosion materials. These butterfly valves possess the mechanical strength of ordinary butterfly valves while also utilizing the chemical properties of the anti-corrosion materials, making them widely used in petrochemical, pharmaceutical, and fine chemical industries.

1. The parts of the valve disc and seat that come into contact with the working medium are all coated with PTFE. Working temperature: -5°C to 110°C, working pressure: less than 1.6 MPa. Suitable for corrosive media such as acids, alkalis, and oxidizers in petrochemical, pharmaceutical, marine, food, and thermal power industries.

2. The valve body and disc are coated with nylon, and the valve seat uses PTFE or fluororubber. Working temperature: -10°C to 100°C, working pressure: less than 1.6 MPa. Suitable for various animal and vegetable oils, weak acids, weak alkalis, and other chemical media.

Valve Seat Material Selection Reference Table

Material	Applicable Temperature	Description
Standard Nitrile Rubber (NBR)	-20 °C ~ 80 °C	NBR offers good elasticity, wear resistance, and resistance to light chemicals. Suitable for water, vacuum, acids, alkalis, salts, oils, lubricants, fuels, and glycol-based fluids.
Low-Temperature Nitrile Rubber (NBR-L)	-40 °C ~ 100 °C	Improved low-temperature performance compared to standard NBR.
High-Temperature Nitrile Rubber (NBR-H)	-20 °C ~ 110 °C	Better heat resistance than standard NBR, slightly reduced chemical resistance at elevated temperatures.
Standard EPDM Rubber (EPDM)	-20 °C ~ 110 °C	EPDM is a versatile synthetic rubber suitable for hot water systems and media containing alcohols, ketones, phosphates, and glycols. Not recommended for hydrocarbon oils or solvents.
High-Temperature EPDM (EPDM-H)	-30 °C ~ 135 °C	Enhanced heat resistance for high-temperature applications.
Acid-Resistant EPDM (EPDM-Y)	-30 °C ~ 135 °C	Excellent resistance to acids and corrosive media.
FDA Grade EPDM (EPDM-FDA)	-30 °C ~ 130 °C	FDA-compliant EPDM suitable for food, beverage, and pharmaceutical applications.
Fluorocarbon Rubber (VITON)	-10 °C ~ 160 °C	Excellent resistance to oils, fuels, and most petroleum products. Not recommended for steam systems above 80 °C.
Oil-Resistant Fluorocarbon Rubber (VITON-G)	-10 °C ~ 160 °C	Improved oil and fuel resistance for demanding chemical environments.
Acid-Resistant Fluorocarbon Rubber (VITON-Y)	-10 °C ~ 160 °C	Superior resistance to acids and aggressive chemicals.
PTFE-N (PTFE with NBR Backing)	-10 °C ~ 80 °C	PTFE offers excellent chemical stability, non-stick surface, low friction, and aging resistance. Suitable for mild corrosive media.
PTFE-E (PTFE with EPDM Backing)	-10 °C ~ 110 °C	Suitable for acidic, alkaline, and oxidizing corrosive media.
PTFE-V (PTFE with Viton Backing)	-10 °C ~ 150 °C	Designed for higher temperature and more aggressive chemical environments.
Neoprene Rubber	-20 °C ~ 90 °C	Good resistance to acids, oils, greases, lubricants, and solvents; also resistant to ozone and weathering.
Silicone Rubber	-30 °C ~ 135 °C	Excellent high- and low-temperature resistance with stable chemical properties. Widely used in pharmaceutical, food, and chemical industries.

Product Structure And Materials

No.	Part	Material	Standard
1	Body	Ductile Iron	ASTM A536 Gr. 65-45-12, EN-GJS-400-15
		Carbon Steel	ASTM A216 WCB, WCC; ASTM A352 LCB, LCC
		Stainless Steel	ASTM A351 CF8, CF8M
		Aluminum Bronze	ASTM B148 C95400, C95500, C95800
2	Seat	Nitrile Rubber (NBR)
		EPDM
		Fluorocarbon Rubber (VITON)
		Natural Rubber (NR)
		Silicone Rubber
		Hypalon (CSM)
		Neoprene
		PTFE
3	Disc	Ductile Iron	ASTM A536 Gr. 65-45-12, EN-GJS-400-15
		Stainless Steel	ASTM A351 CF8, CF8M, CF3, CF3M; SAF2205, SAF2507, CW6M
		Aluminum Bronze	ASTM B148 C95400, C95500, C95800
		Nylon-Coated Ductile Iron
		Rubber-Lined Disc
		Hastelloy with PTFE Lining
4	Upper Stem	Stainless Steel	ASTM A276 SS420, ASTM A564 17-4PH, ASTM A182 F51, etc.
5	Lower Stem	Stainless Steel	ASTM A276 SS420, ASTM A564 17-4PH, ASTM A182 F51, etc.
6	Bearing	Carbon Steel
7	Pin	Stainless Steel
8	O-Ring	Same material as seat
9	Gasket	High-Polymer Fiber
10	Plug	Carbon Steel

Butterfly Valve Structure

Connection Dimensions

NPS	NPS	L	150LB	PN16	PN10	10K	150LB	PN16	PN10	10K	H1	H2	H3	S*S/G	K	D3	D4	n-φd1
			(D1A)	(D1B)	(D1C)	(D1D)	(n-φd)	(n-φd)	(n-φd)	(n-φd)
1.1/2	40	42	98.4	110	110	105	4-19	4-18	4-18	4-16	67	133	14	9*9/12.6	3	65/90	50/70	4-7/10
2	50	42	120.7	125	125	120	4-19	4-18	4-18	4-16	67	133	14	9*9/12.6	3	65/90	50/70	4-7/10
2.1/2	65	45	139.7	145	145	140	4-19	8-18	8-18	4-16	75	137	14	9*9/12.6	3	65/90	50/70	4-7/10
3	80	45	152.4	160	160	150	4-19	8-18	8-18	8-16	82	159	14	9*9/12.6	3	65/90	50/70	4-7/10
4	100	52	190.5	180	180	175	8-19	8-18	8-18	8-16	105	171	18	11*11/15.7	5	90	70	4-10
5	125	54	215.9	210	210	210	8-22	8-18	8-18	8-20	118	189	22	14*14/18.9	5	90	70	4-10
6	150	54	214.3	240	240	240	8-22	8-22	8-22	8-20	135	209	22	14*14/18.9	5	90	70	4-10
8	200	59	298.5	295	295	290	8-22	12-22	12-22	12-20	165	258	24	17*17/22	5	125	102	4-12
10	250	66	362	355	350	355	12-26	12-26	12-22	12-22	200	299	30	22*22/28.4	8	125	102	4-12
12	300	77	413.8	410	400	400	12-26	12-26	12-22	16-22	230	337	30	22*22/31.6	8	150	125	4-14
14	350	77	476.3	470	460	445	12-29	16-26	16-22	16-22	274	350	45	22*22/31.6	8	158	125	4-14
16	400	86/102	539.8	525	515	510	12-29	16-30	16-26	16-24	304	405	50	27*27/33.2	10	175	140	4-18
18	450	105/114	577.9	585	565	565	16-32	20-30	20-26	20-24	335	409	50	27*27/38	10	175	140	4-22
20	500	130	635	650	620	620	30-32	20-33	20-26	20-24	368	460	60	36*36/41.1	10	210	165	4-22
24	600	151	749.3	770	725	730	20-33	20-36	20-30	24-30	428	516	70	36*36/50.6	16	210	165	4-22
28	700	163	863.6	840	840	840	28-35	24-36	24-30	24-30	520	648	80	46*46/62	18	300	254	8-18
32	800	190	977.9	950	950	850	28-39	24-39	24-33	28-30	580	668	80	46*46/62	18	300	254	8-18
36	900	203	1085.8	1050	1050	1050	32-39	28-39	28-33	28-30	656	720	118	55*55/75	20	300	254	8-18
40	1000	216	1200.2	1170	1160	1160	36-39	28-42	28-36	28-36	722	800	148	55*55/85	20	300	254	8-18

Overview

Main Extemal Dimensions

DN	40	50	65	80	100	125	150	200
H1	67	67	75	82	105	118	135	165
H	177	265	287	302	305	372	398	420
A	115	170	170	170	215	215	215	355

Main Extemal Dimensions

DN	40	50	65	80	100	125	150	200	250	300	350	400	450	500	600	700	800	900	1000
H1	67	67	75	82	105	118	135	165	200	230	274	304	335	368	428	520	580	656	722
H	260	308	330	345	383	405	431	584	651	712	804	920	983	1048	1199	1470	1603	1741	1887
A	208	208	208	208	208	208	208	299	299	294	294	351	361	361	417	485	485	534	534
B	174	174	174	174	174	174	174	292	292	308	308	426	426	426	479	578	578	650	650
L	42	42	45	45	52	54	54	59	66	77	77	86	105	130	151	163	190	203	216

Main Extemal Dimensions

DN	40	50	65	80	100	125	150	200	250	300	350	400	450	500	600	700	800	900	1000
H1	67	67	75	82	105	118	135	165	200	230	274	304	335	368	428	520	580	656	722
H	241	289	325	360	398	452	431	570	657	746	867	935	1013	1230	1429	1668	1847	1976	2122
A	130	130	140	140	186	254	208	296	384	384	501	533	589	589	638	1330	1380	1860	1860
B	59	59	70	70	91	120	174	137	173	173	208	224	224	274	322	320	360	440	440
L	42	42	45	45	52	54	54	59	66	77	77	66	105	130	151	163	190	203	216

Main Extemal Dimensions

DN	40	50	65	80	100	125	150	200	250	300	350	400	450	500	600	700	800	900	1000
H1	67	67	75	82	105	118	135	165	200	230	274	304	335	368	428	520	580	656	722
H	284	332	354	400	438	501	521	593	660	747	839	879	1288	1353	1504	1775	1908	2104	2250
A	165	165	212	212	212	259	259	259	259	259	284	284	644	644	644	803	803	887	1015
B	140	140	154	154	154	186	486	186	186	186	193	193	495	495	495	671	671	693	693
L	42	42	45	45	52	54	54	59	66	77	77	86	105	130	151	163	190	203	216

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DN	40	50	65	80	100	125	150	200
H1	67	67	75	82	105	118	135	165
H	177	265	287	302	305	372	398	420
A	115	170	170	170	215	215	215	355

DN	40	50	65	80	100	125	150	200
H1	67	67	75	82	105	118	135	165
H	177	265	287	302	305	372	398	420
A	115	170	170	170	215	215	215	355

DN	40	50	65	80	100	125	150	200
H1	67	67	75	82	105	118	135	165
H	177	265	287	302	305	372	398	420
A	115	170	170	170	215	215	215	355